James b



(No ModelJ J. E. EMERSON:

' SAW.

N0. 281,253, Patented July 17, 1883.

N. PETERS. Halo-MM Wldm 100. DJ;

UNITED STATES PATENT triers.

JAMES E. EMERSON, OF BEAVER FALLS, PENNSYLVANIA.

SAW.

e SPECIFICATION forming part of Letters Patent No. 281,253, dated July 17, 1883.

Application filed April 28, 1883. (No model.)

T at whom it may concern.-

Be it known that I, J AMES E. EMERSON, a citizen of the United States, residing at .Beaver Falls, in the county of Beaver and State ofPennsylvania, have invented certain new and useful Improvements in Saws having Insertible Teeth; and I do declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The object of this invention is to improve the circular or other saws which have insert-ible teeth; and it consists in the construction and the combination of the insertible' tooth with the'recess in the saw-plate, and the clamping devices, as will be fully hereinafter described.

In the drawings, Figure 1 represents a side view of a section of a saw-plate containing a tooth and means for holding it in place. Fig. 2 represents a side view of a section of a sawplate with the tooth. and its clamping devices removed. Fig. 3 is a side view of a removable saw-tooth. Fig. 4 represents the side and end of a clamping-wedge, and Fig. 5 represents the side view of a wedge and socket wrench.

A represents the side view of a section of a saw plate, and A represents the recess or op ening in the saw-plate in which are placed the saw-tooth and its clamping devices. This re cess or opening is the same in form and const-ruction as the recess shown and described in another application made by myself, and filed simultaneously herewith, the difference being in the kind of tooth used and secured therein, and is in the shape seen in Fig. 2, having an elongated base terminating at circular lines a a at each end thereof, and having a sharp ridge, a, on its base, between the terminal circles a to guide and keep the clamping-wedge inplace.

A A are sections of a circle forming the bearing-points for the insertible tooth to rotate in and be secured bet-ween, extending on the forward side from 1 to 2, and on the rear I part of the circle from 3 to 4, and these parts of a circle have inwardly-projecting ridges a, to keep the tooth in place transversely.

At a is a short section of a circle having a shorter radius from the same center with circle A, which serves as a support or bearing for the tooth to bear against, and from the outer terminus of this circle the recess extends in a diagonal but straight line to the perimeter of the sawplate, having a groove, 2, in the straight part, to receive and hold the tooth on its back edge in line with the saw-plate.

B is the insertible and removable tooth for sawing soft-wood umber, having a straight base with a sharp ridge, (1., to guide and keep the clampingwedge in place, and has segments of a circleon opposite sides, as at B B, to agree with the circle-sections A in the walls of the recess of the saw-plate, with V shaped grooves b therein to fit upon and turn on ridges a of the sections of circle A in the saw-plate.

At b is a circular part, which, when in place, abuts against the reverse circular part a. in the saw-plate, and from the outer end of this circular part the back of the tooth is straight, having a ridge, .2, thereon to fit into the groove z in the saw-plate, thence in a line to the cut ting-point I)".

O is a sliding clamping-wedge, tapering, or of less width at one end than at the other, and has V-shaped grooves in its tapering edges, to fit upon the ridges upon the inner line of the recess in the saw-plate and the base line of the tooth B.

O is a tapering slot formed by the inner straight line of the recess A in the sawplate, and between the circular lines (1. on the inner side, and by the short straight line e on the outer side, and the base straight line a of the tooth B, as seen when the tooth is in place in Fig. '1. This slot is extended beyond the for ward circle A in the recess, in order to give room to receive the clamping-wedge C to be out of the way of the rotation of the tooth when turned over, and forms that part of the slot indicated by the letter C, as a housing for the wedge when a tooth is to be inserted or removed.

I) is a tapering wedge-wrench to drive the clamping-wedge under the base of the tooth, or

to loosen the tooth for removal or other purposes, by placing the point d into slot 0 and forcing the wedge under the tooth to clamp it, or on the opposite side of the wedge to force it into that part of the slot 0 to be clear of and thus allow the tooth to be removed by the turning of its forward side down out of the part circle A, when it can be removed from the saw-plate.

To rotate the tooth, in inserting it or for removing it, put the projecting socket-wrench d on wrench D into the opening or hole c in the tooth, and the tooth can be rotated within the segments of circle A. In the wearing away of the tooth B by filing, as shown by broken lines, to point 1/, the tooth will then become worthless, or nearly so, for further use as a tooth, whenthey can at a small expense be changed into a -clamping or throat piece, such as is described in another application filed simultaneously herewith, and as seen in dotted lines on the tooth in Fig. 1.

Having thus fully described my invention,

what I.claim, and desire to secure by Letters Patent, is

1. The insertible and removable tooth B, having its opposite bearing-points, B, on the same circle, in combination with the recess A in the saw-plate A, having corresponding bearing-sections, A", on the same circle, substan tially as and for the purpose described.

2. The insertible and removable tooth B, having its opposite bearing-points, B, on the same circle, in combination with the recess A in the saw-plate A, having corresponding circular bearing-sections, A, on the same circle, and tapering slot 0 for the clamping-wedge 0, having the part 0 extended wholly into the saw-blade beyond the base of the tooth B, for the purpose substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

' JAMES E. EMERSON.

Witnesses:

- S. H. BRAOKEN,

ALONZO B. MCKENZIE. 

